Ribbon-vibrating movement for type-writers.



No. 842,814. PATENTED JAN. 29, 1907.

r G. SG-HERER & J. LINDBURG.

RIBBON VIBRATING MOVEMENT FOR TYPE WRITERS.

APPLICATION FILED AUG'. 11, 1906.

machine, in which we have modifie UNITED STATES PATENT oEEIoE.

ILBERT SCHERER AND JOSEPH LINDBURG, OF DENVER, COLORADO, ASSIGNORS TOTHE UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK.

; RIBBON-VIBRATIN G MOVEMENT FOR TYPE-WRITERS.

Specification of Letters Patent.

Application filed August 11, 1906. Serial No- 630,124.

and J OSEPH LINDBURG, citizens of the United States of America, residingat-Denver, in the county of Denver and State of Colorado, have inventedcertain new and useful Improvemerits in Ribbon-Vibrating Movements forType-Writers, of which the following is a specification.

This invention relates to ribbon-vibrating mechanisms of typ e-writingmachines and its object is to provide simple and .improved means forcausing different widthwise portions of a ribbon to'cover theprintingoint,

especially when the ribbon is provide with two color-bands and itis'desired to write either one color or the other at will. I

Another object is to provide simple means for silencing theribbon-vibrating mechanism so that the typesmay strike off the ribbonwhen it is desired to make stencils.

We illustrate our invention as applied to an Underwood front-strike tye-writin d the ususfi ribbon-vibrating lever and provided it with twowrists, either of which may engage an actuating-arm provided upon theusual universal-bar frame. These wrists are at differand either may bebrought into use While the other one is silenced, thereby altermg thethrow of the lever and ribbon, the wrists being connected by a yoke andbein movable in axial direction independently 0 both the lever and theactuator. Afingerpiece is provided at the front of the machine and-connected to said yoke to control the shifting of the wrists or pins, andthe latter are so constructed that when the finger-piece is in ainidwayposition neitherwrist engages the ac-.

tuator, so thatthe ribbon fails to vibrate at the type-strokes, thusenabling the types to strike off the ribbon. In said. machine the andlower-case etters, and the ribbon-vibrating lever shifts therewith, andour im rove-.

ments includemeans for accommo atiugsuch shifting-movementof the lever.

In the accompanying drawings, Figure 1 is a rear perspectiveelevation,.partly in section,

- of the ribbon-vibrating mechanism of an Underwood'type-writing machineprovided with band of the ribbon into use.

tional frontelevation of'a forked ribbon-vi- Patented. Jan. 29, 1907.

Fig. 2 is a secbrating lever and an actuator with the upper wristconnecting'the lever to the actuator and the lower wrist silenced, thisbeing the position of the parts seen'at Fig. 1. Fig; 3 is a view similarto F silenced and the lower .wrist brought into action, whereby theextent of vibration of the lever is increased and the lower color-bandon the ribbon is brought into use. Fig. 4 is-a view similar to Figs. 2and 3 showingbo-th wrists silenced, so that the ribbon remains ig. 2,but showing the upperwrist motionless'below the printing-point duringtheo eration of the types. Fig. 5 is a'sectiona side elevation showingthe parts in normal o'sitions. Fig. 6' is a view similar, to Fig. 5, t etypes printing through theupper color-band of the. ribbon. Fig. 7 is aview similar to Fig. 6, but showing the types printing through the lowercolor-band of the ribbon. .Fig. 8 is a view similar to Fig.7, butshowing the types striking off the ribbon; Fig. 9 is a plan of a forkedribbon vibratory lever. Fig. 10 is a plan of a yoke carrying a pluralityof wrists. 1

Ty e-bars 1 mounted upon a fulerum rod- 2 an carrying lower-case andupper-case types 3 4, strikeithrough a'ribbon 5 against t e front sideof a platen 6. The type-bar hubs are guided in slots .7, formed in 'asegment 8, and upon the latter is secured a typebar9. Heels 10 on the.ty e-bars press rearwardly a curved universai bar 11, which is fixedupon a frame or table 12. U on the -ciprocates backwardly and; forwardlywith the frame 12 at the type-strokes and causes the ribbon 5 to vibrateup and down to cover and uncover the printing-pointl 1 Saidribbon-islmounted on an upright carrier 14.- and attached to a lever 15,the latter being vibrated by saidcaotuator 13. Said lever-1s .fulcrumedat 1.6 upoma bracket 17, which extends back from aplaten shift-rail 18,upon which runs aro'll 19 of the platen-frame. I The rail andplatefi-dshift up and down in the usual way} to egfialfiheither set oftypes 3 or 4 to print. .3 The lever stride the ac iiator 13. Upper orlower pins or wrists 2,1 and 22 pass through bosses. or

our imlprovements and showingtthe parts in heads 23 24, formedone abovethe other norma position, the ribbon-s'hi ing mechanism being adjustedto bring the upper colorupon said forks. 'lhesbpins or wristszl 22,.

which-are mounted at difierentfiiiistances" formed with forks 20 to be--90 latteris ,."erected an actuator 13, w 'ch reconnected by a yoke 25,so as to slide endwhichever pin 21' or 22 is in enga ement with wise oraxially together in bearings 26 27 in said heads or bosses.

may be slidden in and out to engage either pin with anupwardly-extending slot 28 forked in the arm 13. As will be seen bycomparison of Figs. 2 and 3. the movement of one pin into engagementwith one slot is ac companied by the movement of the other pin out ofsuch engagement, whereby it is silenced. I

The shifting of the yoke and pins may be effected by a finger-piece orhandle 29, mounted at the .front'of the machine upon arearwardly-extending rock-shaft 30, the lat. ter having its rear end inan upwardly-ex tending slotted arm 31 to engage a grooved collar 32,fixed upon the end of a transverse rock-shaft 33. The latter extendsfrom the side to the middle portion of. the type-writing machine, beingsuitably journaled, as upon brackets 34 35, and at its inner endisprovided with an arm 36, which extends rearwardly in a direction aboutparallel with the direction of movement of the actuator 13, and passesloosely through an eye 37 provided in the yoke '25. By means of thehandle 29, acting through the arm 31, the rockshaft and its arm 36 maybe drawn transversely or in the direction of the axes of the pins 21 22,thereby shifting said pins to bring either one into action and.simultaneously silence the other. The arm 36 is stationary during thereciprocations of thelactuator 13,

the yoke slipping idly back and forth along said arm.

A yielding finger 38 is adapted to engage notches formed upon the collar39, fixed upon the rock-shaft 33 to yieldingly detain the latter whereit may be shifted, and stops 40 and 41 may be provided to limit theswinging movements of the handle 29. The latter may be swung to a midwayposition, so that the yielding detent 38 may occupy a notch-42 midway ofthe other notches on the collar 39, and at this time the pins or wrists21 22 will occupy a midway position, as seen at Fig. 4, at

. which time both are out of engagement with.

the actuator 13, so that the'reciprocations of the latter have no effectupon the ribbon, and hence the types may strike off from the ribbon, asat Fig. 8.

When the platen 6 and the platen shiftrail LS are shifted up to enablethe types 4 to print, tlie'bracket 17 and the lever 15 rise,

therewith, together with the yoke 25,. and

the slot .28 rides up in said sli e, which is made of sufiicientheightfor the purpose.

The arm 36 turns about the axis 33 to accommodate npward movement of theyoke 25,

and owing to -nits loose connection with the The bearings are ofsufficient length to retain both pins at all 1 times so that the yokecannot become accidentally unshipped. The yoke and pins;

l eye 37 permits free movement of the yoke at the platen-shiftingoperation and during the writing of capital letters.

Having thus described our invention, we claim lever, wrists connected tosaid lever at difl ferent distances from the fulcrum thereof, an iactuator for said lever, and means for shifting 5 said wristsindependently of the lever to engage eitherwrist with said actuator, andconcomitantly disengage the other wrist from said actuator. j

'2. The combination of a ribbon-vibrating lever, an actuator, wristsmounted at difl'erent distances from the lever-fulcrum, and means forshifting said wrist axially inde pendently of both said lever and saidactuator for bringing either wrist into action, and concomitantlysilencing the other wrist.

The combination of a reciprocating actuator, a ribbon-vibrating leverhaving forks best-riding said actuator, wrists mounted at differentdistances from the fulcrum of the ally independently of both saidactuator and said leverfor bringing either wrist into action,and'conconiitantly silencing'the other wrist.

4. The combination of a reciprocating ac tuator having'a slot, aribbon-vibrating lever having forks bestriding said actuator, wristsmounted upon said lever at different dis- .tances from its fulcrum, andmeans for shiftone to enter said slot, and the other one to withdrawfrom said slot.

5. The combination of a ribbon-vibrating lever, wrists connected to saidlever at different distances from the fulcrum thereof, a yoke connectingsaid wrists, and a reciprocating actuator for said lever; said yokebeing shiftable to ,move said wrists axially into and out of engagementwith said actuator.

6. The combination of a ribbon-vibrating lever, wrists connected to saidlever at different distances from the fulcrum thereof, a yoke connectingsaid wrists, a reciprocating actuator for said lever said yoke beingshiftable tomove said wrists axially into and out of engagement withsaid actuator; a part extending in the direction of reciprocation ofsaid actuator, and loosely connected to said yoke, and means includingafinger-piece for shifting the said part to move said wrists in axialdirection. 1 7. The combination of a ribbon-vibrating lever, areciprocating actuator, Wrists mount 1. The combination of aribbon-vibrating lever, and means for shifting the wrist axiing saidwrists simultaneously to cause either ed at different distances from thelever-fulcrum and connected by a yoke, and shiftable independently ofsaid lever and actuator, a partlooselyengaging said yoke and extend ingin the direction of movement of said ac tuator, anda finger-piececonnected to the said part to move said yoke and wrist in axialdirection.

8. In atype-writing machine, the combination with a platen-shiftingmechanism, of

a ribbon-vibrating lever shiftable with said mechanism, a reel rocatingactuator, wrists yoked'together an mounted at difierentdistancesfrom thefulcrum of said lever and shiftable axially in bearingsprovided uponsaid lever, a rockshaft having an'arm ex tending in the 'directionofreciprocation of said actuator and loosely connected to said oke, toshift the latter, and also to move 1dly therewith during the platenshifting operation, and a finger-piece having means to shift saidrock-shaft endwise.

9. The combination of a ribbon-vibrating lever, wrists connected to saidleverlat differ-'- ent distances from the fulcrum thereof,'areciprocating actuator between said wrists, and means for shiftingsaid wrists axially independently of both the lever and the actuator,and means for detaining said wrist either in such a position that oneengages the actuator, oi in such a position that theother engages theactuator, or in such a position that neither engages the actuator.

10. The combination of a reci rocating actuatdr, a ribbon-vibratingever, wrists mounted at different distances from the ful crum of thelever, and means including a fin geriecei for shifting the wristsaxially indepen ently of both-sa1d actuator and said lever, so as tobring eitherone wrist or the other, or. neither of them into action atwill.

11. The combination of a reci rocating aetuator having a slot, a'rlbbon-vi rating lever having forks bestridl'ng said actuator, wrists.mounted upon'said lever at different distances from its fulcrum, meansfor shifting sa1d wrlsts simultaneous to cause-either oneto enter sa1dslot, am the other one to withdraw from said slot, and means fordetaining said wrists in a midway osition in i which neither of themengages sai slot.

\ 12. In a'type-writing machine, the combination with a shifting-platenmechanism, of

a ribbon-vibrating lever shiftable with, said" platen, an actuating-armhaving a slot ex-- tendinginL-the direction .of the shifting of theplaten, wrists mounted at different polnts along the'lever, and meansfor shifting said wrists at either shift position of the platenshiftingmechanism, so as to bring either wrist into actlon, and simultaneouslysllence the other wrist. -13. In a type-writmg machine, the combinationwith a shifting-platen mechanism; of

azribbon-vibrating lever shiftable with said platen, an actuating-armhaving a slot extending in the direction of the shifting of the platen,wrists mounted at different points along the lever, and means forshifting said. wrists at either shift'position ofthe platenlatwill. 1

shiftingmechanism, so as to bring either wrist into action, andsimultaneously silence the other wrist, or so as to silence both wrists14. In combination, a mechanism, a finger-piece mountedupon theframework,-a rock-shaft connected to said finger-piece to be moved I.endwise thereby, an arm extendingfromsaid rock -shaft, an actuatorreciprocatingin the direction. of said arm, a rlbbon-vibrating levershiftableup' and down with theplate'n, and means loosely connected tosaid arm .for'causin'g said actuator to vibrate said lever to differentdistances atwillJ ,15. In a type-writing machine having type-operatingke s anda' universal barreclprocated'by sai keys,.the combination of anactuator connected to said universal bar and having a slot, 'a If1bb'011VlbISL1I/1D lever, a

plateniding said wrists for I' clprocated by sai keys, the combinationof .an actuator connected to said universal bar, a ribbon-vlbratmglever, axpalr of wristsfat different distances from the fulcrum of saidlever, and means for moving said wristsst multaneously to silence eitherthereof, and cause the other to connect said lever to said actuator. t

7. In a ty e-writirig machine having type operating eys and a universalbar reciprocated by said keys, the combination wlth a ribbon vibrator orcarrier, of shif table means'for'enabling' said universal bar to vibratesaid carrier different distances at the t e-strokes, said vibratingmeans including a ever between the universal bar and the carrier, a pairof'wrists mount-ed at different distances from the fulcrum of saidlever,

movementetransmitting means cooperating with sa1d lever and sa1dwristsyand means for shifting said wrists axially at the same time, tobring elther nto use and silence the other:

In testimonvwhereof we have affixed our signatures 1n presence oftwowitnesses.

GILBERT SGHERER. I

JOSEPH LINDBURG.

'Witnesses:

HENRY P. SPENCER? -A. W. EATON.

I ro

